Most Searched Codes
P0300 critical Random/Multiple Cylinder Misfire Detected P0420 moderate Catalyst System Efficiency Below Threshold (Bank 1) P0171 serious System Too Lean (Bank 1) P0442 minor Evaporative Emission Control System Leak Detected (Small Leak) P0128 moderate Coolant Temperature Below Thermostat Regulating Temperature P0455 moderate Evaporative Emission Control System Leak Detected (Large Leak) P0700 serious Transmission Control System Malfunction P0301 serious Cylinder 1 Misfire Detected P0340 critical Camshaft Position Sensor Circuit Malfunction (Bank 1) P0131 serious O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)
Browse by System
Car Code Finder is a free diagnostic code reference with 10,922+ OBD-II codes. Each code includes causes ranked by likelihood, step-by-step diagnostics, repair cost estimates, and vehicle-specific fixes.